A flaw was discovered in the way Ansible templating was implemented in versions before 2.6.18, 2.7.12 and 2.8.2, causing the possibility of information disclosure through unexpected variable substitution. By taking advantage of unintended variable substitution the content of any variable may be disclosed.
access.redhat.com/errata/RHSA-2019:3744
access.redhat.com/errata/RHSA-2019:3789
bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10156
github.com/ansible/ansible
github.com/ansible/ansible/commit/04e94274fb92e116e9082cc9b86b1fd05c836922
github.com/ansible/ansible/commit/3ff6505e8ff0e4655bab008886983476ef903375
github.com/ansible/ansible/commit/a11c3edfa41e7e4a4db323cdabfc2eae1b61da2a
github.com/ansible/ansible/pull/57188
lists.debian.org/debian-lts-announce/2019/09/msg00016.html
lists.debian.org/debian-lts-announce/2021/01/msg00023.html
nvd.nist.gov/vuln/detail/CVE-2019-10156
www.debian.org/security/2021/dsa-4950